MAX6845
MAX6845
LAST TIME BUYUltra-Low-Voltage µP Reset Circuits and Voltage Detectors
Ultra-Low-Voltage SC70 µP Supervisors Monitor Supplies Down to 0.9V with No External Components
- Part Models
- 3
- 1ku List Price
- price unavailable
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Overview
- Factory-Set Reset Threshold Voltages for Monitoring Supplies from 0.9V to 1.5V (MAX6841/MAX6842)
- Adjustable Threshold RESET IN (MAX6843/MAX6844/MAX6845)
- Low Power Consumption: 5.7µA (typ)
- ±2.5% Reset Threshold Accuracy Over Temperature
- Five Timeout Periods: 150µs (Voltage Detector Version), 1.5ms, 30ms, 210ms, and 1.68s
- Available in Three Output Configurations
- Push-Pull active-low RESET
- Push-Pull RESET
- Open-Drain active-low RESET
- Guaranteed Reset Valid to VCC = 0.55V (Active Low)
- Manual Reset Input
- Immune to Short VCC Transients
- Space-Saving 5-Pin SOT23 Package
The MAX6841–MAX6845 microprocessor (µP) supervisory circuits monitor ultra-low-voltage power supplies in µP and digital systems. They provide excellent circuit reliability at low cost by eliminating external components and adjustments when used with +0.9V to +1.5V systems. Factory-trimmed reset thresholds are available for the MAX6841/MAX6842. The MAX6843/MAX6844/MAX6845 provide a RESET IN input, allowing the user to externally adjust the reset threshold. The MAX6841–MAX6845 family features a debounced manual reset input (active-low MR). The reset comparator is designed to ignore fast transients on VCC.
The MAX6841–MAX6845 assert a reset signal whenever the VCC supply voltage declines below a preset or adjustable threshold or whenever manual reset (active-low MR) is asserted. Reset remains asserted for a fixed timeout delay after VCC has risen above the reset threshold and when manual reset is deasserted. Five timeout periods are available for each part: 150µs (voltage detector version), 1.5ms, 30ms, 210ms, and 1.68s (typ).
The MAX6841/MAX6843 have an active-low push-pull reset output. The MAX6841/MAX6842/MAX6844 have an active-high push-pull reset output, and the MAX6842/MAX6845 have an active-low open-drain reset output. The active-low open-drain reset output requires a pullup resistor that can be connected to a voltage from 0 to VCC.
The low supply current (5.7µA) and small package (SOT23-5) make the MAX6841–MAX6845 ideal for use in portable equipment.
Applications
- Computers
- Controllers
- Critical µP and µC Power Monitoring
- Intelligent Instruments
- Portable Battery-Powered Equipment
- Servers and Workstations
- Telecom/Networking Equipment
- Wireless Base Stations
Documentation
Data Sheet 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX6845UKD0+T | SOT_23 | ||
| MAX6845UKD3+ | 5-SOT_23-N/A | ||
| MAX6845UKD3+T | 5-SOT_23-N/A |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 11, 2021 - 1703RN ASSEMBLY |
||
| MAX6845UKD0+T | ||
| MAX6845UKD3+ | Obsolete | |
| MAX6845UKD3+T | Obsolete | |
|
Feb 4, 2015 - 1341_CANCELLATION ASSEMBLY |
||
| MAX6845UKD3+ | Obsolete | |
| MAX6845UKD3+T | Obsolete | |
|
Jan 9, 2015 - 1481 WAFER FAB |
||
| MAX6845UKD3+ | Obsolete | |
| MAX6845UKD3+T | Obsolete | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Parts | Product Life Cycle | Description |
|---|---|---|
| Supervisory Circuits & Reset ICs 9 | ||
| MAX6832 | PRODUCTION | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
| MAX6833 | Obsolete | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
| MAX6834 | PRODUCTION | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
| MAX6835 | PRODUCTION | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
| MAX6836 | LAST TIME BUY | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
| MAX6837 | PRODUCTION | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
| MAX6838 | PRODUCTION | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
| MAX6839 | Obsolete | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
| MAX6840 | PRODUCTION | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
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